18868741933728 has 48 divisors (see below), whose sum is σ = 49530864972960. Its totient is φ = 6289527641856.

The previous prime is 18868741933711. The next prime is 18868741933739. The reversal of 18868741933728 is 82733914786881.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 18868741933728.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11587426 + ... + 13115102.

It is an arithmetic number, because the mean of its divisors is an integer number (1031893020270).

Almost surely, 2^{18868741933728} is an apocalyptic number.

It is an amenable number.

18868741933728 is an abundant number, since it is smaller than the sum of its proper divisors (30662123039232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18868741933728 is a wasteful number, since it uses less digits than its factorization.

18868741933728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656349 (or 1656341 counting only the distinct ones).

The product of its digits is 780337152, while the sum is 75.

The spelling of 18868741933728 in words is "eighteen trillion, eight hundred sixty-eight billion, seven hundred forty-one million, nine hundred thirty-three thousand, seven hundred twenty-eight".